Cohort studycited by the Tayebat archiveabstract only checked A-DRY-09 standard review
US boys: skim milk linked to acne
Milk consumption and acne in teenaged boys.
Overview
Adebamowo CA et al.. J Am Acad Dermatol 2008 · PMID 18194824 · DOI 10.1016/j.jaad.2007.08.049
Highest (>2 servings/day) vs lowest (<1/wk): total milk PR 1.16 (1.01-1.34), whole/2% 1.10 (0.94-1.28), low-fat 1.17 (0.99-1.39), skim 1.19 (1.01-1.40).
Does the study support the specific claim? Partly · Methodological quality: moderate
Plain-language summary
Study explained simply
- What did the researchers want to find out?
Milk and acne.
- How was the study done?
Prospective cohort with prevalence ratios.
- How many people, animals or samples were studied?
4,273 boys
- What was actually found?
More acne with more milk.
- How large was the observed effect?
Highest (>2 servings/day) vs lowest (<1/wk): total milk PR 1.16 (1.01-1.34), whole/2% 1.10 (0.94-1.28), low-fat 1.17 (0.99-1.39), skim 1.19 (1.01-1.40).
- What do the results mean in everyday life?
Small association with a minor condition.
- What are the study's limitations?
Self-report; observational.
- What does it say about Elawady's specific claim?
Supports an association.
- Do the results apply to Germany and Europe?
Moderate.
- What can explicitly not be concluded from this study?
Causation.
Scientific in-depth review
1. Full reference
- Authors
- Adebamowo CA, Spiegelman D, Berkey CS, Danby FW, Rockett HH, Colditz GA, Willett WC, Holmes MD
- Journal
- J Am Acad Dermatol
- Year
- 2008
- Identifier
- PMID 18194824 DOI 10.1016/j.jaad.2007.08.049 · PMC4391699
- Verification
- verified – PubMed E-utilities efetch, 2026-10-25
- Retracted
- no
- Corrections
- none
- Extent checked
- abstract only
- Conflicts of interest and funding
Conflicts of interest: None declared. Grants listed in PubMed: NIDDK NIH HHS
2. Research question
Is dairy/milk intake associated with teenage acne?
3. Study design and population
- Study design
- Cohort study – Prospective cohort with prevalence ratios.
- Population
Boys in the Growing Up Today Study
- Country
USA
- Period
FFQs 1996-98; acne 1999
- Sample size
4,273 boys
- Inclusion and exclusion criteria
Not detailed in abstract.
4. Methods and endpoints
- Exposure / intervention
Milk types and dairy foods (FFQ).
- Comparator
Lowest intake category
- Endpoints
Self-reported or recalled physician-diagnosed acne.
- Statistical methods
Multivariate prevalence ratios.
5. Actual results
- Results
Highest (>2 servings/day) vs lowest (<1/wk): total milk PR 1.16 (1.01-1.34), whole/2% 1.10 (0.94-1.28), low-fat 1.17 (0.99-1.39), skim 1.19 (1.01-1.40).
- Absolute risks
not reported
- Authors' conclusion
Positive association between milk (especially skim) and acne; hormones/bioactive molecules in milk hypothesised.
6. Strengths
- Large samples
- Consistent direction across studies by the same group
7. Weaknesses
- Self-reported acne
- Acne assessed once by questionnaire
- Same research group; not independent replications
- No adjustment for some lifestyle factors (stated in A-DRY-09)
8. Risk of bias
- Orienting tool
- ROBINS-E
- Type of assessment
- simplified assessment (abstract only)
- Full formal assessment
- no
- Overall risk of bias
- some concerns
- Rationale
Recall and measurement bias likely; confounding possible.
9. Assessment of the statistical interpretation
Modest prevalence ratios; some CIs near 1.
10. Relevance to the specific claim
Supporting C-DRY-08.
11. Independent contrary findings
No RCTs; I-DRY-09 reports publication bias.
12. Transferability to Germany and Europe
Moderate.
13. Overall methodological judgement
Consistent observational association; causality unproven.
| Multidimensional assessment | |
|---|---|
| Authenticity of the source | verified |
| Methodological quality | moderate |
| Risk of bias | some concerns |
| Precision of results | moderate |
| Directness | direct |
| Reproducibility | partly replicated |
| Consistency with the overall evidence | consistent |
| Regional transferability | moderate |
| Adequacy of the interpretation (by the archive) | essentially correct but incomplete |
14. Open questions
RCT evidence.
15. Linked fact checks
- Milk intake (especially skim milk) causes acne in teenagers. – Studies supporting the claim
Use by the Tayebat archive
Note: according to the archive, the studies were compiled by the archive operators. Whether Dr. Elawady himself cited this study is not established.
- What the archive says about the study
Listed in bibliography (acne).
- A. What was actually studied?
Milk/dairy intake and teenage acne.
- B. What did the authors find?
Highest (>2 servings/day) vs lowest (<1/wk): total milk PR 1.16 (1.01-1.34), whole/2% 1.10 (0.94-1.28), low-fat 1.17 (0.99-1.39), skim 1.19 (1.01-1.40).
- C. What conclusions do the authors themselves draw?
Positive association; hormonal hypothesis.
- D. What does the archive derive from it?
Supports 'acne signals in teenagers' as part of the dairy-harm narrative.
- E. Is this derivation scientifically justified?
Listed only; association only.
- Adequacy of the interpretation (by the archive)
- essentially correct but incomplete